Back brace



FIG. 1 is a front perspective view of a back brace showing the new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an exploded view thereof;

FIG. 10 is a front perspective view of the back brace with both arms in a shortened position;

FIG. 11 is a rear perspective view with the back flap in an open position;

FIG. 12 is a front elevational view of the back brace in a fully extended position; and,

FIG. 13 is a rear elevational view of the back brace in a fully extended position.

The dot-dash broken lines in FIG. 9 show an order of assembly of the exploded view, and form no part of the claimed design. 

CLAIM The ornamental design for a back brace, as shown and described. 